It can be converted into: 1 schoolbag price = 1 cultural shirt ×2-6 yuan.
That is:
?
=
18
×2-6
30 yuan
The price of a schoolbag is 30 yuan.
(2) Key points
The cost is not less than that of 350 yuan but not more than that of 400 yuan to reward outstanding students in mountain primary schools.
The remaining funds shall not exceed 1800-350= 1450 yuan and not be less than 1800-400= 1400 yuan.
1 schoolbag
1 T-shirt =48 yuan
(30
18=48 yuan)
Not set
The remaining funds can also buy a schoolbag and a cultural shirt for each of X primary school students.
Enumerable inequality set: 48x
≤ 1450
48x≥ 1400
The solution is 29 1/6 ≤x≤30 1/24.
Take a positive integer
∴x=29,30